<!doctype html>
<html lang="en">
 <head>
  <meta charset="UTF-8">
  <title>Document</title>
 </head>
 <style>
 li.a{
	list-style:square inside url("2.png");
 }
 </style>
 <body>
  <ul>
  <li>列表项</li>
  <li class="a">列表项</li>
  <li>列表项</li>
  </ul>
 </body>
</html>
